The Paris Agreement aims to keep global warming by 2100 to below 2 °C, but the probability of this is only 5% based on current trends. To have an even chance of staying below 2 °C, country-based rate of emissions reductions should increase by 80% beyond nationally determined contributions.

If you made an effort to read their site instead of nitpicking literally just the header on their home page. Yes they state their mission very clearly. Yes it's bold. Yes, there might be room for transitional energy sources that aren't completely renewable, but we're already developing those quite intensively at the moment. These sources of energy are just a bandaid that will need to be ripped off eventually, and I would rather not promote them when we really should be rolling out renewables as quickly as possible.

They do take the time to explain their stance using more than just "weasel words", as you say. They're a pretty well-known organization that's been around for a while--well before we blew past 350ppm!

/r/science Thread Parent Link - nature.com